Cake Tin Conversion Calculator
Convert your cake recipe between different tin shapes and sizes in seconds. Whether your recipe calls for a round cake tin or a square cake pan, we have you covered.
Original Recipe Tin
Your Target Tin
Scale an Ingredient
Enter any amount (grams, ml, ounces, or number of eggs) to see the mathematically scaled equivalent. For eggs, round to the nearest whole egg or whisk and measure.
How to Use the Cake Tin Conversion Calculator
Select original tin
Choose the shape and enter the dimensions specified in your original recipe.
Select target tin
Enter the shape and dimensions of the cake tin you actually want to use.
Get recipe multiplier
The calculator will instantly tell you how much to multiply your ingredients by.
Scale ingredients
Use the ingredient scaler box to quickly calculate your new measurements.
How Cake Tin Conversion Works
Round to Square Cake Tin Conversion
A 20 cm round tin is not equal in area to a 20 cm square tin. A square tin has corners, giving it approximately 25% more volume than a round tin of the same width. Our calculator uses precise geometric formulas to account for this difference automatically.
This cake tin converter also works for recipes that use the US term 'cake pan'.
Cake Tin Depth and Baking Time
If your new tin produces a deeper layer of batter, baking may take slightly longer, and you might need to lower the oven temperature slightly to prevent the outside from burning before the middle cooks. If the batter is shallower, begin checking for doneness earlier.
Common UK Cake Tin Equivalents
| Original Tin | Similar-Capacity Alternative | Approx. Multiplier |
|---|---|---|
| 15 cm (6") Round | 13 cm (5") Square | 0.95× |
| 20 cm (8") Round | 18 cm (7") Square | 1.03× |
| 23 cm (9") Round | 20 cm (8") Square | 0.96× |
| 25 cm (10") Round | 23 cm (9") Square | 1.08× |
Note: Calculations assume tins are of identical depth.
Frequently Asked Questions
Is a cake tin the same as a cake pan?
In most baking recipes, yes. UK recipes usually say 'cake tin', while US recipes commonly use 'cake pan'. For this calculator, both terms refer to the baking container whose shape and size you want to convert.
How do I scale up my cake for the ingredients?
Take the original recipe and multiply each ingredient by this, shown in our calculator= "Recipe Multiplier" So if your multiplier is 1.25× and the recipe says to add 200g of flour, you should calculate entering this measurement in grams as a total :250g = (200 × 1.25).
How does the measurement of cake tin depth affect how you convert?
Yes, if you needed the cake to be precisely as tall / short of a cake recipe calls for. If your new tin's shallower, you need to volume scale (untick "same depth" otherwise the batter will overflow)
Can I use a 9 inch tin instead of an8inch tin
Yes! An 8 inch (20 cm) round tin is about a quarter smaller than a 9 inch (23cm) round tin. With our calculator, all you have to do is multiply your ingredients by 1.27!
So when you change tin size, do I need to adjust the baking time?
Note: Baking times vary from the original tin as it may be shallower (or deeper) than the new one. Converted recipes always take longer to bake if they give you a deeper cake. If it is less deep, check on it sooner.